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12×20 Garage shed plan

  • Uses: garage, storage, workshop, studio, office
  • Detailed tools and materials lists
  • Complete blueprints with easy-read measurements
  • Numbered instructions suitable for beginners
  • Color images to enhance text directions
  • Plans for building a stable foundation and heavy-duty floor platform
  • Options to build your own garage door or install a lift door
  • Plans for additional doors and windows
  • Diagrams for installing vents and entry ramp


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12x20 Garage Shed Overview

For homeowners who want a solidly built storage shed packed with value, this 12 x 20 garage shed is worth considering. The shed offers 240 square feet of floor space, which is plentiful enough to park your car and store a few more items. It has an extra-wide 8′ x 7′ ¼” opening that allows you to drive your vehicle in and out with minimal risks of scratching its sides. You can also bring in lawn care machines, workbench, wheelbarrows, bicycles, and anything you think can go inside. Its tall siding walls are ready to accommodate long-handled tools and equipment.

The shed is also designed to serve other functions perfectly. You can use it as an office, workshop, or studio. It is outfitted with a 2 feet 8 inches front door that offers access anyone would need for a home office. There are also two square windows with 3′ 4″ sides which let sufficient light inside.

The shed is engineered to last, and its wooden walls can be finished to your exact specification for better looks. The gable roof adds to its overall classic looks. As with most shades, this garage shed is sure to add value and interest to your property while providing a way to protect your belongings from bad weather and elements.

Why Should You Build Your Own 12x20 Gable Garage Shed?


DIY and Save Up to $3.500

A garage addition or contractor-built shed costs thousands. Build your own shed and save up to $3,500.


240 sq. ft. Extra Space

Garage overflowing with equipment? Give it all a new home in a dedicated garage shed, and park your car where it belongs.


Increase Property Value

Outbuildings add value to your property, and homebuyers love the durability of a wooden shed to protect their belongings.

Compare Free vs Premium Plan

Check out the main benefits of our premium shed plans. Compare the differences and decide for yourself.

12x20 Garage shed facts and figures

12x20 garage shed
12' W x 20'-1 1/2" L x 11'-6" H
Materials Cost:
$17-$24 per square foot
Plywood sheathing, clapboard siding, asphalt shingles
Roof type:
240 square feet
Instant PDF download
Plywood sheathing
Choice of paint or stain

Real People, Real Reviews.

We ask every paid customer for a review. No matter good or bad. Here is what they say!

Based on 23 reviews.
A nice set of plans to give us an idea… A nice set of plans to give us an idea of what it costs to build on site vs buying a prefab structure, and the quality differences between them. This set of plans is "bomb proof" according to my local lumberyard guy. 2x6 joists on 12" centers, compared to 2x4s on 24" centers for the prefab models. A real foundation, not just some 4x4 skids. It looks like a major amount of work, but the result could be a really nice garden shed sturdy enough to house our commercial-grade chipper as well as the big mower.
Getting my plans was so easy. Getting my plans was so easy, I picked the plan I wanted I paid for it I downloaded it instantly.
James Isbrandt
James Isbrandt
The price for plans is way too high The price for plans is way too high, but the plans are fairly decent. You DO have to know a little something about construction and adjustments of measurements, but for the most part, not too bad.
Excellent detail of materials list and… Excellent detail of materials list and constructions specifications
Rey davis
Rey davis
Excellent Excellent plans and customer support
Chad Davis
Chad Davis
Concise and Detailed The plans were concise and contained everything I needed. The images were extremely helpful as well as the cut list.
A little hard to follow in some places A little hard to follow in some places
A+++++++++++ A+++++++++++
John Turgeon
John Turgeon
The plans are missing a critical step The plans were missing a critical step, and my original message to Shedplans wasn't received. I received a message from them after posting my problem here, and they subsequently sent me the revised instructions. Very grateful for their follow-up. Now if lumber prices would just return to normal....
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12x20 garage shed plan

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